Embedding Cs2AgBiBr6 QDs into Ce-UiO-66-H to in situ construct a novel bifunctional material for capturing and photocatalytic reduction of CO2

光催化 原位 双功能 嵌入 还原(数学) 构造(python库) 催化作用 材料科学 化学工程 纳米技术 化学 计算机科学 工程类 计算机网络 数学 人工智能 有机化学 几何学
作者
Lan Ding,Fenghua Bai,Burenbayaer Borjigin,Yuning Li,Huiqin Li,Xiaojing Wang
出处
期刊:Chemical Engineering Journal [Elsevier BV]
卷期号:446: 137102-137102 被引量:58
标识
DOI:10.1016/j.cej.2022.137102
摘要

• Cs 2 AgBiBr 6 quantum dots were in situ anchored into the micropore of Ce-UiO-66-H. • Cs 2 AgBiBr 6 /Ce-UiO-66-H combine photocatalytic properties and CO 2 capture capacity. • Embedded structure increases linkers defect and provides more CO 2 catalytic sites. • Bifunctional Cs 2 AgBiBr 6 /Ce-UiO-66-H presents a high CO 2 photoreduction rate. Solar-energy-driven CO 2 conversion into valuable chemical fuels holds great renewable potential. However, most photocatalysts' weak CO 2 adsorption limits more artificial photosynthesis for further utilization. Herein, we present an in situ assembling approach to produce stable Cs 2 AgBiBr 6 /Ce-UiO-66-H composite, in which a tight contact interface between the two participated components was constructed. Benefiting from the photocatalytic properties and high adsorption capacity for CO 2 , the optimized 20Cs 2 AgBiBr 6 /Ce-UiO-66-H adsorption-photocatalyst exhibits outstanding performance for reductive CO 2 deoxygenation with considerable CO generation rate (309.01 μmol g −1 h −1 ) under simulated solar light irradiation with 300 W Xe lamp, which is about 2.1 and 2.7 times than that of pure Cs 2 AgBiBr 6 and Ce-UiO-66-H, respectively. The excellent catalytic conversion of CO 2 is ascribed to the effective solar harvest and quickly photo-excited carriers’ separation in such assembled architecture. Importantly, due to the in-situ synthesis, Cs 2 AgBiBr 6 QDs are intercalated in the Ce-UiO-66-H frameworks and it could lead to improved stability and induce abundant oxygen vacancies in Cs 2 AgBiBr 6 /Ce-UiO-66-H, which can maintain unchangeable CO 2 conversion rate under wet air with consecutive ten hours of the recycling test. In this work, the combining metal–organic frameworks and lead-free halide perovskite provide great potential for artificial photocatalytic CO 2 -to-CO conversion under a mild gas–solid reaction condition via utilizing solar energy.
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